ECHO BASICS PHYSICS AND INSTRUMENTATION. - DR. NAIR ANISHKUMAR P.K.V. Mechanical vibration transmitted through an elastic medium. Spectrum of sound. Sound. Ultrasound can be directed as a beam and focused A s ultra sound passes through a medium it obeys laws of reflection and refraction
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- DR. NAIR ANISHKUMAR P.K.V
1) The transducer size is predominantly limited by the size of the intercostal spaces.
2) Although higher frequency does lengthen the near field, it also results in greater attenuation and lower penetration of the ultrasound energy
and to display different shades of grey
For accurate identification of borders display texture or detail within the tissues.
Useful to differentiate tissue signals from background noise.
targets over time.
TRANSMITTING ULTRASOUND ENERGY
(billiard ball effect)